|Rank|Nation|Gold|Silver|Bronze|Total|
|---|---|---|---|---|---|
|1|Venezuela|7|4|3|14|
|2|Bolivia|2|2|2|6|
|2|Chile|2|2|2|6|
|4|Peru|1|3|3|7|
|5|Ecuador|1|1|1|3|
|6|Colombia|0|1|2|3|
|Total|Total|13|13|13|39|

Question: what is the number of silver medals won by peru and ecuador combined?
Answer: 4